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24 October 2017 Image quality improvement in optical diffraction tomography by multiple numerical propagations and separated reconstructions
Xichao Ma, Wen Xiao, Feng Pan
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Proceedings Volume 10462, AOPC 2017: Optical Sensing and Imaging Technology and Applications; 104622C (2017) https://doi.org/10.1117/12.2284457
Event: Applied Optics and Photonics China (AOPC2017), 2017, Beijing, China
Abstract
The image quality of optical diffraction tomography is likely to decline due to some key factors, including limited depth of focus, the rotational error and localized RI discontinuities. This paper describes reconstruction methods to circumvent these three factors for improved image quality. The limited depth of focus and the rotational error are addressed simultaneously with a method based on multiple numerical propagations. The localized RI discontinuities are addressed with a method based on separated tomographic reconstructions. Experimental results are demonstrated to verify the described methods. A four-core optical fiber and a large-mode photonic crystal fiber is measured and processed by the method based on multiple numerical propagations with improved image quality. The depth of field is significantly extended. Samples with different typical RI discontinuities, two kinds of fusion spliced optical fibers, are measured and reconstructed. While reconstructions by existing methods are heavily disturbed, the 3D maps obtained with the described method are free from spreading disturbance and show important structures as well as the positions and estimated shapes of the discontinuities. The described methods are of practical significance and will find important applications in 3D imaging of various objects.
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Xichao Ma, Wen Xiao, and Feng Pan "Image quality improvement in optical diffraction tomography by multiple numerical propagations and separated reconstructions", Proc. SPIE 10462, AOPC 2017: Optical Sensing and Imaging Technology and Applications, 104622C (24 October 2017); https://doi.org/10.1117/12.2284457
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KEYWORDS
Tomography
Image quality
Optical tomography
Image processing
Digital holography
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